package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @description:
 * @author: 韩汶锦
 * @date: 2025/4/2
 */
 @Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Transactional
    @Override
    public void save(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);

        Long id = dish.getId();

        List<DishFlavor> list = dishDTO.getFlavors();
        if (!list.isEmpty()){
            list.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            dishFlavorMapper.insertBatch(list);
        }
    }

    /**
     * @description:
     * @author: 韩汶锦
     * @date: 2025年04月02日
     *  * @Param dishPageQueryDTO
     *  * @Return com.sky.result.PageResult
     **/
    @Override
    public PageResult selectByPage(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.select(dishPageQueryDTO);
        return new  PageResult(page.getTotal(),page.getResult());

    }

    @Override
    public void delete(List<Long> ids) {
        for (Long id : ids) {
            Dish dish = dishMapper.getByid(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);

            }
        }
        List<Long> setmealIds = setmealMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }


        //删除菜品表中的菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);//后绪步骤实现
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);//后绪步骤实现
        }
    }

    /**
     * @description:根据id查询
     * @author: 韩汶锦
     * @date: 2025年04月03日
     *  * @Param id
     *  * @Return com.sky.vo.DishVO
     **/
    @Override
    public DishVO selectById(Long id) {
        DishVO dishVO = dishMapper.selectById(id);
        return dishVO;
    }

    /**
     * @description: 修改菜品
     * @author: 韩汶锦
     * @date: 2025年04月03日
     *  * @Param dishDTO
     *  * @Return void
     **/
    @Override
    public void updateDish(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
    }

    /**
     * @description:根据菜品分类查询
     * @author: 韩汶锦
     * @date: 2025年04月03日
     *  * @Param categoryId
     *  * @Return java.util.List<com.sky.vo.DishVO>
     **/
    @Override
    public List<Dish> selectByCategory(Long categoryId) {
        List<Dish> list = dishMapper.selectByCate(categoryId);
        return list;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.updateStatus(status,id);
    }
}
